package com.quan.commons.core.configuration;

import com.alibaba.fastjson.JSON;
import com.quan.commons.core.bean.R;
import com.quan.commons.core.constant.CommonsConstant;
import com.quan.commons.core.properties.SystemValueProperties;
import com.quan.commons.core.utils.JwtUtils;
import com.quan.commons.core.utils.RedisUtils;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.HttpStatus;
import org.springframework.stereotype.Component;
import org.springframework.web.servlet.HandlerInterceptor;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.nio.charset.StandardCharsets;

/**
 * Token验证拦截器
 * @author yhaoquan
 *
 */
@Slf4j
@Component
public class WebSecurityAuthTokenInterceptor implements HandlerInterceptor {

	@Autowired
	private RedisUtils redisUtils;

	@Autowired
	private SystemValueProperties properties;

	/**
	 * 这个方法是在访问接口之前执行的，我们只需要在这里写验证登陆状态的业务逻辑，就可以在用户调用指定接口之前验证登陆状态了
	 */
	@Override
	public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
		//log.debug("请求地址：{}", request.getRequestURL());
		// 管理端路径需校验权限，是否登录
        // 请求头获取token
        String token = request.getHeader("token");
        // 获取用户ID
        String userId = JwtUtils.getUserId(token, this.properties.getJwt().getSecret());
        String redisKey = CommonsConstant.RedisPrefix.SSO_TOKEN + ":" + userId ;
        // 验证Redis中该token是否存在
        boolean hasToken = this.redisUtils.hasKey(redisKey);
        
        if(hasToken) {
            // 刷新token时间
            this.redisUtils.expire(redisKey, this.properties.getJwt().getTimeout());
            // 验证通过放行
            return true;
        } else {
			response.reset();
			response.setContentType("application/json; charset=utf-8");
			ServletOutputStream out = response.getOutputStream();
			
			R result = R.failure(HttpStatus.UNAUTHORIZED.value(), "未登录或登录超时，请重新登录");
            byte[] bytes = JSON.toJSONString(result).getBytes(StandardCharsets.UTF_8);
            out.write(bytes);
            
        	return false;
        }
	}

}
